(under subclass 330) Smoking devices claiming the construction of the smoke passage.
(1) Note. Compare this class, subclass 201 and indented subclasses.
SEE OR SEARCH CLASS
428, Stock material or Miscellaneous Articles, appropriate subclasses, for a stock material in the form of a single or plural layer web or sheet, and especially
292.1+, for a composite web or sheet including a layer containing structurally defined fibers, and subclasses 364+ for a fiber or filament which is structurally defined (e.g., crimped, specific cross-section) or is coated.
